For any pair of objects, each object attracts the other with a force that is directly proportional to the product of the masses of the objects, and inveresely proportionall to the square of their distances between their center of masses.

Linear Momentum

Product of mass and velocity of an object.

Rotational Inertia

The reluctance of an object to change its state of rotation, determined by the distribution of the mass of the object and the location of the axis of rotation or revolution